#!/usr/bin/perl
use warnings;
$a = 4;
$b = 10;
print "the two variables are :",$a ," and ", $b,"\n";
$b=$a++;
print "now b is : " , $b,"\n";
print "29 plus "+  20 ,"\n";
$name= "Younes souidi";
print "Hey ", $name ," check you disk partition :","\n\n";
print ` df -h`;

my $name = "Adam";
print "My Name is ",$name,"\n";
$command1 = `<STDIN>`;
print $command1;
